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Hollow cathode assembly

A hollow cathode and cathode technology, which is applied to the installation/support/configuration/insulation of electrode assemblies, can solve the problems of short service life of heaters, shortened service life of hot cathodes, and low heating efficiency, so as to reduce contact area, Extended heat conduction path and high heating efficiency

Inactive Publication Date: 2013-02-27
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing cathode has problems such as low heating efficiency and short service life of the heater, which shortens the service life of the hot cathode

Method used

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and specific examples.

[0014] Hollow cathode assembly of the present invention such as figure 1 As shown, it specifically includes: cathode tube 14, heat isolation tank 8, heat shield cylinder 7, heater 6, heater insulation cylinder 5, cathode 3, inner heat insulation ring, cathode isolation ring 2, cathode top 1; Heat insulating ring, cathode 3, cathode isolating ring 2, and cathode top 1 are sequentially put into the cathode tube 14, there is a slot in the cathode tube 14, and the cathode top 1 is installed at one end of the cathode tube 14; On the cathode tube, the heater 6 is wound in the wire groove on the heater insulation cylinder 5; the heat shield cylinder 7 is set outside the heat insulation cylinder 5; two fixing rings 4 fix the heater insulation cylinder 5 and the heat shield cylinder 7 , one end of the heater 6 is connected to a fixing ring, and the other ...

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Abstract

The invention discloses a hollow cathode assembly and belongs to the field of a vacuum electronic technology. The assembly comprises a heater insulating barrel which is used as a hollow cathode, and a heat shielding barrel, wherein the heat shielding barrel is provided with a heat isolating groove; and a cathode tube is internally provided with single-hole and multi-hole inner separation rings which are alternatively arrayed. According to the hollow cathode assembly, the heater insulating barrel is arranged on the heat shielding barrel so as to reduce the contact area, reduce conduction heat energy, prolong a heat conduction path and reduce cathode heat energy loss; and the heater insulating barrel is arranged and is not reacted with a heater at a high temperature, so that the service life of the heater is prolonged, the service life of a cathode is prolonged and the hollow cathode assembly is applicable to majority of heat cathodes.

Description

technical field [0001] The invention belongs to the technical field of vacuum electronics, and in particular relates to a hollow cathode assembly with high heating efficiency and long service life. Background technique [0002] The cathode plays a very important role in many fields. In the military, the cathode is the heart of various microwave electronic devices, low-light night vision devices, infrared imaging devices and ultraviolet imaging devices. At the same time, in industrial and medical equipment, X-ray tubes, image intensifiers, accelerator tubes and displays using cathodes as emission sources play a very important role. In scientific research, the cathode is also an indispensable key component in various analytical instruments, electron beam processing, electron beam exposure, electron beam evaporation and other equipment. [0003] In many places where the cathode is applied, the cathode needs to be operated at high temperature. Therefore, under the condition of ...

Claims

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Application Information

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IPC IPC(8): H01J1/88
Inventor 林祖伦祁康成
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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